Calculation of Track Parameters of Alpha Particles with Various Energies and Incident Angles in CR-39 Detector

In this paper, the bulk etch rate, VB of the CR-39 detector employed, was found experimentally to be equal to 1.49mh-1. Detector samples were irradiated with alpha particles energies from 1 to 5MeV and incident angles from 20 to 90. After etching in a 6.25N NaOH solution kept at (701) C, the lengths of major and minor axes of the alpha track openings were measured, and the track etch rate, VT for normal and oblique incidence was calculated. The relationship between VT and the track depth, x of the alpha particle in the detector for normal incidence was studied. Track length, L and track length growth rate, dL/dt were also calculated. These data were used altogether to derive a V function, which took the functional form of the Bruns function with new constants (a1=0.091, a2=1.2, a3=1.6, a4=1.61, a5=1.425). Experimental V function was compared with those computed by TRACK-VISION program, and a good agreement with three of them was found